Known for their extreme brutalism and use of summary executions, ISIS have reached a new level of evil with activists reporting that the jihadi militants beheaded two women in Syria for alleged 'sorcery.'

It is believed to be the first time ISIS have executed a woman in Syria for crimes of 'witchcraft' and 'sorcery', the Syrian Observatory for Human Rights monitor said today.

'The Islamic State group executed two women by beheading them in Deir Ezzor province, and this is the first time the Observatory has documented women being killed by the group in this manner,' Observatory chief Rami Abdel Rahman said.

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It is believed to be the first time ISIS have executed a woman in Syria for crimes of 'witchcraft' and 'sorcery'. A sorcerer (pictured) was executed next to his charms last month

ISIS have also targeted people for alleged sorcery in Libya. New photos emerged last month of a man being executed near Benghazi

The Britain-based monitor said the executions took place on Sunday and Monday and involved two married couples.

In both cases, the women were executed with their husbands, with each pair accused of witchcraft and sorcery.

The Islamic State group has become infamous for gruesome executions and is reported to have stoned women to death on allegations of adultery.

But the Observatory said this was the first time it was aware of the group beheading women.